Enzyme

2. A reaction that absorbs free energy from the surroundings.
5. A substance that takes part and undergoes changes during a metabolic or chemical reaction.
7. The sum of all the chemical reactions occuring in that cell.
10. The energy that is required to start any reaction.
12. The process of breaking down large molecules into smaller ones.

1. It describes the active site as flexible and changes shape or conforms to the substrate as they bond together.
3. It describes the active site ad having a set shape.
4. The substance, molecule, or organism formed at the end of a chemical reaction or biological process.
6. Organic cofactors.
8. The process of making large molecules from smaller ones.
9. A reaction that has a net release of free energy.
11. Molecules that reduce or stop the enzyme from functioning.